Wrench



Mach 25, 1924.

P. VSB'IKIAN ET AL I WRENCH Filed nec. 4, 1922 e LV l @NXNTORS 28 Fmg. I. fhlr attorney I ml U 28 Patented Mar. 25, 1924.

MNM STATES rarest arriba.

WRENCH.

Application filed December 4, 1922.

To all 'whom 'it may concern.'

Be it known that we, PETER VosBIKiAN 'and THOMAS VosBIKIAN, citizens of Armenia (about to become citizens of the United States of America), and residents of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in lVrenches; and we do hereby declare the following to be a full, clear, and exa-ct description of the same, such as will enable others' skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to figures of reference marked thereon, which form part of this specification.

Like figures of reference refer to like parts.

This invention relates to wrenches, particularly to that kind known as monkey wrenches.

vThe ordinary forms of monkey wrenches have small adjusting pieces provided with a small circular knurled part to be held bctween the thumb and finger, when turning the same. This knurled part is usually shrouded on about a third of its circumfer? ence, by the part within which it turns, so that only a small angular turn is possible without taking a fresh hold. Then also the diameter of this knurled part is too small to afford much of a lever arm to the force exerted by the contacting thumb and finger.

One of the objects of the invention herein illustrated and described is to providev a knurled manipulating nut, of a diameter similar to thatof the handle and to have the co-acting parts ofthe wrench, which move the adjustable jaw, co-axially arranged with the handle, so that the nut surface is in line with that of the handle and the whole surface of the nut is exposed for a gripping action of the hand which encircles the handle, thus taking advantage of an increased diameter, affording a much greater lever arm to the contacting parts of the hand which turns the nut.

Other objects of cheapness, strength and pleasing design, for a good article of manufacture, were in mind when devising the wrench herein illustrated and described.

With these and other objects, one embodiment of our invent-ion is illustrated in the drawings, is hereinafter described, its opera- Serial No. 604,811.

tion is explained and what we claim is set forth.

In the drawings,

Figure 1 is a side elevation of a monkey wrench embodying our invention.

Figure 2 is a sectional elevation of the wrench shown in Figure 1.

Figure 3 is a section taken on the line 3-3 of Figure 2.

Figure 4 is a section taken on the line 4-4 of Figure 2.

Figure 5 is a section taken on the line 5*.5 of Figure 2.

Figure 6 is a section taken on the line 6-6 of Figure 2.

In the figures, 1 is the flat sided core bar of the wrench, extending throughout its length and having a portion 2 of prismatic or rectangular section, terminating in the head jaw 3, with which it is integral. The mid-portion 4, of the bar 1, has two opposite flat faces, continuous with the broader of the flat faces of the portion 2, the narrower of the flat faces of the portion 2, terminating in the shoulders 5, have adjoiniug'them the threaded surfaces between the shoulders 5 and the point 6. The thickness of the por` tion 4, between its flat faces is less than the diameter of the root of the threads 7. From the point 6 to the shoulder 8, the sides 9 of the bar 1 are curved, of a diameter equal to the root of the threads 7 In threaded engagement with the portion 4, is the prismatic piece 10, havingan octagonal shank 11, a knurled flange 12 and a circular extension 13, upon which is an annular groove 14. The extension 13 is journaled within the round boss 15, which shoulders against the flange 12. Pointed screws 16 in the boss 15, engage the annular groove 14 and hold these parts against relative longitudinal displacement, while permitting the piece 10 to turn within the boss 15. The boss 15 is integral with the shank 17, of the jaw 18, which fits in sliding engagement with the rectangular portion 2, of the core bar 1. durability,

Fitting in sliding engagement with the prismatic piece 10, on its octagonal shank 11, is the sleeve 19, having a knurled cylindrical surface 20. The inner surface of the por tion 21, of the sleeve 19, in' contact with the shank 11, is octagonal, while the inner surface 22 of the remaining portion of the sleeve 19 is cylindrical. At 23, the lower shell 25, which forms the handle of the Wrench. The sleeve 19, while being held at the groove 241- against longitudinal displace-V ment, with respect to the handle 25, is free to be turned thereon, when operating the jaw 18. 'lhe lower end of the shell handle 25 is closed, forming a base 2G, through which is fitted the stein 2?, terminating in a riveted head 28, securely holding lthe core bar 1 and the handle 25, together.

ln operation, the jaw 1S is moved in adjustment, relative to the jaw 3, by the turning of the piece 10, upon the threaded portion l of the core bar 1. 'lhe piece 10 can be turned either by gripping and turning the knurled flange 18, which is an integral part of the piece 10, oi by gripping and turning the sleeve 19, which is slidingly keyed upon the shank 11 of the piece 10. lf desired, the flange 12 can be made only suf-- i'iciently large to serve the purposes of a shoulder to the boss 15, to take the thrust, dispensing with the knurled surface shown, and having the sleeve 19 only, as the part to be gripped and turned, to turn the piece 10. On the other hand, the sleeve 19 can be dispensed with and the knurled flange 12, as shown, can be used in adjusting the jaws, in which case, the octagonal surface 11, of the piece 10, can be cylindrical to slidingly lit within the handle 25. The shouldered flange 13 takes the thrust of the boss 15, when the wrench is in use and the opening between the jaws and 18 inust be maintained against spreading. The engagement of the screws 16, with the annular groove 14, comes into play, when the nut 19 is turned to widen the opening between the jaws 3 and 18.

T he construction of the wrench above described involves the co-axial arrangement of the core bar 1, the prisinatic piece 10, the nut 19 and the handle 25, permitting of easily gripping the knurled nut 19, while the users hand encircles the handle 25, lending to convenience in operation while handling the wrench. The combination of the parts as assembled, lends additional stiffness and rigidity to the leng part of the wrench as a handle, and the long threaded engagement ofthe piece 10 with the core bar 1, lends to a relatively7 fixed relation of all the parts, when once adjusted; offering at the same time a positive in ans for close adjustment upon the nut or body to be gripped by the jaws of the wrench. lf additional stiffness is desired, the inner cylindrical surface of the shell 25, may be made to lit against the corners of the shank 11. Besides, the ar rangement and shape of the parts exteriorly, present in appearance, a substantial looking wrench.

lnasmuch as changes in the details of construction of the wrench herein shown and described can be changed without departing from the spirit and scope of our invention,

we do not wish to be confined to the one Velement and said shank longitudinally together, a handle fixed to said bar at its lower end, and enclosing a part thereof in spaced relation thereto and a sleeve swiveled on the handle against longitudinal movement thereon, having the said prismatic element in sliding engagement keyed therewith, said sleeve having a portion conforming in sliding fit to the prismatic element.

2. A wrench having a movable jaw and a fined jaw, a central bar, a hollow handle fixed at one end of said bar and surrounding the saine in spaced relation, said fixed jaw being fixed at the opposite end of said bar, said movable jaw having a shank portion, said movable jaw being in keyed, sliding engagement with said central bar, a sleeve swivelled against longitudinal movement with said shank portion, and in threaded engagement with said central bar, the exterior surface of said sleeve being prismatic, and a turning nut in sliding and keyedV engagement with said exterior surface, Vby which said sleeve is turned on said bar, said nut being in swiveled engagement against longitudinal movement on said handle, said sleeve being adapted to move within the space between said handle and said bar during a movement of said movable jaw.

3. A wrench having a movable jaw and a fixed jaw, a central bar fixed to said fixed jaw and extending the full length of the wrench, a hollow handle fixed to said bar and surrounding the same in spaced relation, said movable jaw having a shank extension, and being' in keyed sliding engagement with said bar, a sleeve in threaded .engagement with said bar and connected with said shank to swivel thereon against longitudinal movement thereon, to move longitu-VVV dinally with said shank and said movable jaw, said sleeve being 'positioned to move within the space between said handle and said bar, and means on said vsleeve for moving the same.

PETER VOSBIKIAN THOMAS VOSBIKIAN. 

